The ratio of the number of scones to the number of wafers in a shop is 3 : 1. A scone costs $1.60 and a wafer costs $0.70. If all the scones and wafers are sold, a sum of $110 will be collected. How many scones are there altogether?
| |
Scones |
Wafers |
Total |
| Number |
3 u |
1 u |
|
| Value |
$1.60 |
$0.70 |
|
| Total value |
4.8 u |
0.7 u |
$110 |
Amount collected if all the scones are sold
= 3 u x 1.6
= 4.8 u
Amount collected if all the wafers are sold
= 1 u x 0.7 u
= 0.7 u
Amount collected if all the scones and wafers are sold
= 4.8 u + 0.7 u
= 5.5 u
5.5 u = 110
1 u = 110 ÷ 5.5 = 20
Total number of scones
= 3 u
= 3 x 20
= 60
Answer(s): 60
